ttm: Make parts of a struct ttm_bo_device global.

Common resources, like memory accounting and swap lists should be
global and not per device. Introduce a struct ttm_bo_global to
accomodate this, and register it with sysfs. Add a small sysfs interface
to return the number of active buffer objects.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>

1 files changed, 5 insertions, 7 deletions

diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index 4e1e2566d51..b0f73096d37 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -166,7 +166,7 @@ static void ttm_tt_free_user_pages(struct ttm_tt *ttm)
                         set_page_dirty_lock(page);
 
                 ttm->pages[i] = NULL;
-                ttm_mem_global_free(ttm->bdev->mem_glob, PAGE_SIZE);
+                ttm_mem_global_free(ttm->glob->mem_glob, PAGE_SIZE);
                 put_page(page);
         }
         ttm->state = tt_unpopulated;
@@ -177,8 +177,7 @@ static void ttm_tt_free_user_pages(struct ttm_tt *ttm)
 static struct page *__ttm_tt_get_page(struct ttm_tt *ttm, int index)
 {
         struct page *p;
-        struct ttm_bo_device *bdev = ttm->bdev;
-        struct ttm_mem_global *mem_glob = bdev->mem_glob;
+        struct ttm_mem_global *mem_glob = ttm->glob->mem_glob;
         int ret;
 
         while (NULL == (p = ttm->pages[index])) {
@@ -348,7 +347,7 @@ static void ttm_tt_free_alloced_pages(struct ttm_tt *ttm)
                                 printk(KERN_ERR TTM_PFX
                                        "Erroneous page count. "
                                        "Leaking pages.\n");
-                        ttm_mem_global_free_page(ttm->bdev->mem_glob,
+                        ttm_mem_global_free_page(ttm->glob->mem_glob,
                                                  cur_page);
                         __free_page(cur_page);
                 }
@@ -394,7 +393,7 @@ int ttm_tt_set_user(struct ttm_tt *ttm,
         struct mm_struct *mm = tsk->mm;
         int ret;
         int write = (ttm->page_flags & TTM_PAGE_FLAG_WRITE) != 0;
-        struct ttm_mem_global *mem_glob = ttm->bdev->mem_glob;
+        struct ttm_mem_global *mem_glob = ttm->glob->mem_glob;
 
         BUG_ON(num_pages != ttm->num_pages);
         BUG_ON((ttm->page_flags & TTM_PAGE_FLAG_USER) == 0);
@@ -439,8 +438,7 @@ struct ttm_tt *ttm_tt_create(struct ttm_bo_device *bdev, unsigned long size,
         if (!ttm)
                 return NULL;
 
-        ttm->bdev = bdev;
-
+        ttm->glob = bdev->glob;
         ttm->num_pages = (size + PAGE_SIZE - 1) >> PAGE_SHIFT;
         ttm->first_himem_page = ttm->num_pages;
         ttm->last_lomem_page = -1;